• The Journal of the Petrological Society of Korea
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• v.23 no.3
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• pp.261-272
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• 2014

Over the last three decades, advances in AMS (Accelerator Mass Spectrometry) and Noble Gas Mass Spectrometer make various application of terrestrial cosmogenic nuclides (CNs) to wide range of earth surface sciences possible. Dating techniques can be divided into three sub-approaches: simple surface exposure dating, depth-profile dating, and burial dating, depending on the condition of targeted surfaces. In terms of Korean landscape view, CNs dating can be applied to fluvial and marine terrace, alluvial fan, tectonic landform (fault scarp and faulted surfaces), debris landforms such as rock fall, talus, block field and stream, lacustrine and marine wave-cut platform, cave deposits, Pliocene basin fill and archaeological sites. In addition, in terms of lithology, the previous limit to quartz-rich rocks such as granite and gneiss can be expanded to volcanic and carbonate rocks with the help of recent advances in CNs analysis in those rocks.

• Analytical Science and Technology
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• v.21 no.1
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• pp.9-13
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• 2008

We have collected a batch of leaf samples at several main crossroads in Daejeon and a background site to obtain distribution of $CO_2$ (greenhouse gas) due to fossil fuel combustion. The leaf samples were treated with AAA method and ${\Delta}^{14}C$ values of them were measured using AMS. ${\Delta}^{14}C$ values of downtown sites were found to be lower by 27-102 ‰ than that of the background site, and the ratio of $CO_2$ originated from fossil fuel combustion in the atmosphere of Daejeon could be calculated from the differences of ${\Delta}^{14}C$ values. The average ${\Delta}^{14}C$ of the background site, around Kyeryong mountain, was measured to be $35{\pm}8$ ‰, and this value is lower than 66.3 ‰, which have been known as the backgdound values in USA.